Global Patent Index - EP 0353052 A3

EP 0353052 A3 19901227 - PROCESS FOR PRODUCING FIBRES COMPOSED OF OR COATED WITH CARBIDES OR NITRIDES

Title (en)

PROCESS FOR PRODUCING FIBRES COMPOSED OF OR COATED WITH CARBIDES OR NITRIDES

Publication

EP 0353052 A3 19901227 (EN)

Application

EP 89307609 A 19890727

Priority

CA 573505 A 19880729

Abstract (en)

[origin: EP0353052A2] The invention provides a process for producing fibres composed of or coated with carbides or nitrides. The process involves forming a first reaction zone (23) containing microfine particles of an oxide (or oxide precursor) of silicon or a suitable metal (e.g. boron) uniformly mixed with carbon (or a carbon precursor); forming a second reaction zone (24) comprising a layer having a thickness of 1 cm or less of a porous mass having a density of 1 g/cc or less formed of short or continuous fibres made of or coated with carbon (or carbon precursor); heating the first reaction zone (23) in a non-oxidizing atmosphere to generate a gaseous sub-oxide of the silicon or metal; simultaneously heating the second reaction zone (24) so that the gaseous sub-oxide diffuses into it and reacts with the carbon to form carbide or nitride on the fibres; and separating the resulting fibres from any carbide or nitride whiskers that may have formed in the second reaction zone. Short or continuous fibres (e.g. in the form of a fabric or paper-like sheets) consisting of or coated with carbides or nitrides can be formed in this way.

IPC 1-7

D01F 9/08; C04B 35/56; C04B 35/58

IPC 8 full level

C01B 21/064 (2006.01); C01B 21/068 (2006.01); C01B 31/36 (2006.01); C04B 35/56 (2006.01); C04B 35/58 (2006.01); C04B 35/622 (2006.01); D01F 9/08 (2006.01); D01F 9/10 (2006.01); D01F 9/127 (2006.01); D01F 11/12 (2006.01)

CPC (source: EP US)

C04B 35/62281 (2013.01 - EP US); C04B 35/6229 (2013.01 - EP US); C04B 35/62839 (2013.01 - EP US); C04B 35/6286 (2013.01 - EP US); C04B 35/62863 (2013.01 - EP US); C04B 35/62892 (2013.01 - EP US); D01F 9/08 (2013.01 - EP US); D01F 11/124 (2013.01 - EP US); D01F 11/126 (2013.01 - EP US); D01F 11/128 (2013.01 - EP US); C04B 2235/3201 (2013.01 - EP US); C04B 2235/3409 (2013.01 - EP US); C04B 2235/3418 (2013.01 - EP US); C04B 2235/424 (2013.01 - EP US); C04B 2235/5248 (2013.01 - EP US); C04B 2235/79 (2013.01 - EP US); Y10T 428/2916 (2015.01 - EP US); Y10T 428/2918 (2015.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

BE CH DE ES FR GB IT LI NL SE

DOCDB simple family (publication)

EP 0353052 A2 19900131; EP 0353052 A3 19901227; JP H02212312 A 19900823; US 5116679 A 19920526

DOCDB simple family (application)

EP 89307609 A 19890727; JP 19790189 A 19890729; US 38524889 A 19890725